-er -ic bbb bbc bbd bbe bbg bbi bbk bbo bbr bcb bcc bcd bce bcg bci bck bco bcr bdb bdc bdd bde bdg bdi bdk bdo bdr be- beb bec bed bee beg bei bek beo ber bgb bgc bgd bge bgg bgi bgk bgo bgr bi- bib bic bid bie big bii bik bio bir bkb bkc bke bkg bkk bko bkr bob boc bod boe bog boi bok boo bor brb brd bre brg bri brk bro brr c-- cbb cbc cbd cbe cbg cbi cbk cbo cbr ccb ccc ccd cce ccg cci cck cco ccr cdb cdc cdd cde cdg cdi cdk cdo cdr ce- ceb cec ced cee ceg cei cek ceo cer cgb cgc cgd cge cgg cgi cgo cgr ci- cib cic cid cie cig cii cik cio cir ckb ckc ckd cki cko co- cob coc cod coe cog coi cok coo cor crb crc crd cre crg cri crk cro crr dbb dbc dbd dbe dbg dbi dbk dbo dbr dcb dcc dcd dce dcg dci dck dco dcr ddb ddc ddd dde ddg ddi ddk ddo ddr de- deb dec ded dee deg dei dek deo der dgc dgd dge dgg dgi dgk dgr di- dib dic did die dig dii dik dio dir dkb dkc dke dkg dki dkk dko dkr dob doc dod doe dog doi dok doo dor drb drc drd dre drg dri drk dro drr ebb ebc ebd ebe ebg ebi ebk ebo ebr ec- ecb ecc ecd ece ecg eci eck eco ecr ed- edb edc edd ede edg edi edk edo edr eeb eec eed eee eeg eek eeo eer egb egc egd ege egg egi ego egr eib eic eid eie eig eii eik eio eir ekb ekc ekd eke ekg eki eko ekr eo- eob eoc eod eoe eog eoi eok eoo eor erb erc erd ere erg eri erk ero err g-d gbc gbd gbe gbg gbi gbk gbo gbr gcb gcc gcd gce gcg gci gck gco gcr gdb gdc gdd gde gdi gdk gdo gdr ge- geb gec ged gee geg gei gek geo ger ggb ggc ggd ggg ggi ggo ggr gib gic gid gie gig gii gik gio gir gkb gkd gko gob goc god goe gog goi gok goo gor grb grc grd gre grg gri grk gro grr i-d ibb ibc ibd ibe ibg ibi ibk ibo ibr icb icc icd ice icg ici ick ico icr idb idc idd ide idg idi idk ido idr ie- iec ied iee ieg iei iek ier igb igc igd ige igg igi igk igo igr iib iic iid iie iii iio iir ikb ikc ike iki ikk iko ikr io- iob ioc iod ioe iog ioi ioo ior ir- irb irc ird ire irg iri irk iro irr kbb kbc kbd kbe kbi kbk kbo kbr kcb kcc kcd kce kcg kci kck kcr kdb kdc kde kdg kdk kdo kdr ke- keb kec ked kee keg kei kek keo ker kgb kgc kgd kgi kgo kib kic kid kie kig kii kik kio kir kkb kkc kke kki kkk kkr kob koc kod koe kog koi kok koo kor krc krd krg kri krk kro krr o-i ob- obb obc obd obe obg obi obk obo obr oc- ocb occ ocd ocg oci ock oco ocr odb odc odd ode odg odi odo odr oeb oec oed oee oeg oei oeo oer ogc ogd oge ogg ogi ogo oib oic oid oie oii oik oio oir okb okc okd oke okg oki okk oko okr oo- oob ooc ood oog ooi ook ooo oor or- orb orc ord ore org ori ork oro orr rbb rbc rbd rbe rbg rbi rbk rbo rbr rcb rcc rcd rce rcg rci rco rcr rdb rdc rdd rde rdg rdi rdo rdr re- reb rec red ree reg rei rek reo rer rgb rgc rgd rge rgg rgi rgk rgo rgr rib ric rid rie rig rii rik rio rir rkb rkc rke rkg rkk rko rob roc rod roe rog roi rok roo ror rrb rrc rrd rrg rri rrk rrr